Sheet music question: What is this symbol?

https://preview.redd.it/l9dqi2qtuyod1.png?width=1051&format=png&auto=webp&s=736c9b70c04b0c82b1bf3ec2966284e4be62721a

From Dyens' arrangement of Astor Piazzolla's Obvilion: what is this crossed-out glissando symbol? What does it mean?